Search gender: all male female ナナナコ Japanese Names Variations. 1 names found. gender: all male female Name: nananako Katakana: ナナナコ 0 Kanji: 七菜子 Meaning: 七Seven. Seventh. Kanji character for the number 7 (seven). Many times. 菜Vegetable. A general term for vegetables whose leaves, stems, roots, and other parts are eaten. Side dish. 子Children You can save your favorite names with NAZUKE PON > About Japanese Names > Search Japanese Names By Kanji > ナナナコ Japanese Names Variations.